fix: DPO implementation bug in forward_dpo (issue #1449)#1855
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huyyxyshare wants to merge 1 commit intoFunAudioLLM:mainfrom
Open
fix: DPO implementation bug in forward_dpo (issue #1449)#1855huyyxyshare wants to merge 1 commit intoFunAudioLLM:mainfrom
huyyxyshare wants to merge 1 commit intoFunAudioLLM:mainfrom
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- Changed mask logic from '== IGNORE_ID' to '!= IGNORE_ID' - Fixed gather index to use '~mask' for padding positions - This ensures DPO loss is computed on valid tokens only, not IGNORE_ID positions
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Summary
Fix a serious bug in the DPO implementation as reported in issue #1449.